CHROMIUM: Input: atmel_mxt_ts - optimize writing of object table entries

CHROMIUM: Input: atmel_mxt_ts - optimize writing of object table entries

Write each object using a single bulk i2c write transfer.

Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
BUG=chromium-os:27713
TEST=confirm objects written properly by comparing table in
  chromeos_laptop to output of:
  cat /sys/bus/i2c/<dev>/object

  Note, however, that some objects are overwritten by pdata config values,
  or at runtime.

Change-Id: Iad557101796b472397585b59a4404d8bbf83fcf6
Reviewed-on: https://gerrit.chromium.org/gerrit/17953
Commit-Ready: Daniel Kurtz <djkurtz@chromium.org>
Reviewed-by: Daniel Kurtz <djkurtz@chromium.org>
Tested-by: Daniel Kurtz <djkurtz@chromium.org>